Improvement in locks for doors



Z Sheets--Sheet 1.

"J. H. KINSMA-N. LOCKS FOR 1100mm.

Patented Dec. 26, 1876.

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2 Sheets-Sheet Z. J. H. KINSMAN.

Lo'exs FOR nouns, &c. No.185,761. Patented Dec, 26, 1876.

WITNESSES INVENTOR m a W 2% W Wk .dttomay.

THE GRAPHIC MJLC UNTTED STATE PATENT QFFICE.

JOHN H. K-INSMAN, 0F SALEM, MASSAoHUSETTs.

IMPROVEMENT IN LOCKS FOR DOORS, &c.

Specification formingpart of Letters Patent No. l85,761, dated December6, i876; application filed July 20, 12576.

To all whom i t may concern:

Be it known that I, JOHN H. KINSMAN, of Salem, in the county of Essexand State of Massachusetts, have invented certain new and usefulImprovements in Locks, of which the following is a specification:

Figure l is a plan view, with top plate of the lock removed, showing theinternal parts in position when the lock is locked. Fig. 2 is a detailplan view, showing the tumblers, rollers, and bolt when the lock isunlocked. Fig. 3 is a detail view, showing parts with top movable guideplate away. Fig. 4 'iS a perspective view in detail to show the leg ofthe latch adapted to operate on the lever that moves the rollerguide-plates. Fig. 5 is a perspective view of the bolt.

The purpose of the present invention is to produce a lock in which thebolt Shall be held, when locked, by a movable roller, that cannot bereached from the outside to be moved, and which is placed in position tostay the bolt, and is removed therefrom by the movements of thetumblers, as the bolt is being thrown or returned and to this end itconsists more particularly in the combination, with a lock having aseries of primary and secondary tumblers, of a bolt, and locking rollerfitting and moving vertically in a slot in said bolt, and vertically orhorizontally in a right angled Slot in the movable guide-plates operatedby a suitable spring lever attachment moved by an arm on the latch so asto fall into or be removed from a suitable seat in the secondarytumblers; and in the general combination and arrangement of the severalparts of the lock to produce the end aforesaid, all as will now be morein detail Set out and explained.

In the drawings, A denotes the primary, and B the secondary, tumblersplaced between washers in the lock in such a manner as to admit of freemovement in concert with each other. The said secondary tumblers B areprovided each with a bent spring, I), at its rear end. Each spring issecured at one end to a tumbler, while its free end b is bent up andbehind it, and, being braced by the post 0, as shown, is adapted tooperate with said free end upon the tumbler, in conjunction with andassisting the other and fixed end of the spring, as shown in Fig. 2. Bythis means said spring is double-acting, and certainty of movement ofthe tumblers is attained. The bolt D has a horizontal movement on post 0in slot at, about midway its length, and has a vertical slot, 0?, ofconsiderably larger dimensions near its inner end. This latter slot isnot only the pathway in which the roller E is adapted to movevertically, but in conjunction with said roller, and the upper end ofthe right-angled slotsff, in the upper and lower guide-plates F F, formsa stop to hold the bolt when the lock is locked. In this position thesaid roller is held at both ends, so that it can have no forward orbackward movement, and being stayed upon the upper edges of the tumblersB, can have no vertical motion, and, as the roller passes through theslot 01 in said bolt, it will firmly hold said bolt so that it cannot bethrown back.

If, now, it shall be desired to unlock the lock, the primary andsecondary tumblers will be moved by the key till the slots 12 in thesecondary tumblers are in conjunction under the roller. At this momentthe weight of the roller E will cause it to fall into the seat made bythe conjunction of said slots. Now, if the latch G shall be drawn in bythe turning of the handle or knob, its depending arm 9 will engage uponthe shoulder a of the bolt, and cause said bolt to retract inconjunction with the latch. The bolt will, in this movement, also carrythe roller E along the horizontal part f of the right angled slot in theguideplates, and thus will cause the secondary tumblers to move backlikewise. At this point the slot g in the arm g of the latch will engageupon the rounded end of the arm h of Spring-lever H, which has a Spring,it, suitably braced against a post, or otherwise, and causes its innerarm or projection h, operating in slot f of guide-plate F, to throw upsaid plate. This will also carry with it the plate F, which is attachedto it, and the two will thus take the roller out of the slots in thesecondary tumblers.

ward by the action of spring b b, and the roller E will rest in theinner end of the rightangled Slot in the guide-plates, and upon theupper edges of said tumblers. The bolt is The said tumblers, thus beingreleased, will be thrown a little forthus withdrawn, and now the latchcan be operated free from any connection with the locking mechanism.

To throw the bolt now, to look the lock, the leg 11 is moved by the key,the roller is thus carried forward, passes into the vertical portion fof the slot in the guide-plates, which are thus thrown down by thespring-lever H, and the guide plates, roller, and bolt will be in theposition referred to at the beginning of the specification. Theguide-plates may have slots f, which are adapted to receive the post 0",and thus steady the movement of said plates.

Having thus described my invention, what I claim, and desire to secureby Letters Patout, is-

l. The combination of bolt D, having slot (1, with the notched secondarytumblers, movable guide-plates, and roller E, substantially as and forthe purposes described.

2. The combination of the latch, having a depending and notched arm withthe bolt, and the spring-lever adapted to operate the guideplates androller, substantially as set forth.

3. The combination of the springs b with tumblers B, each spring havinga free end, b, and adapted to operate at both ends on the tumbler, towhich it is connected, substantially as and for the purposes set forth.

4. In a lock, having primary and secondary tumblers, as described, thecombination of a roller and movable guide-plates with the bolt,substantially as and for the purposes set forth.

In testimony that I claim the foregoing as my own I afiix my signaturein presence of two witnesses.

JOHNQH. KINSMAN.

Witnesses WILLIAM FITCH, PHILIP MoNmKLE.

